Harvesting electrical energy from torsional thermal actuation driven by natural convection
- Title
- Harvesting electrical energy from torsional thermal actuation driven by natural convection
- Author
- 김선정
- Keywords
- NANOTUBE YARN MUSCLES; ARTIFICIAL MUSCLES; NANOFIBERS
- Issue Date
- 2018-06
- Publisher
- NATURE PUBLISHING GROUP
- Citation
- SCIENTIFIC REPORTS, v. 8, Article no. 8712
- Abstract
- The development of practical, cost-effective systems for the conversion of low-grade waste heat to electrical energy is an important area of renewable energy research. We here demonstrate a thermal energy harvester that is driven by the small temperature fluctuations provided by natural convection. This harvester uses coiled yarn artificial muscles, comprising well-aligned shape memory polyurethane (SMPU) microfibers, to convert thermal energy to torsional mechanical energy, which is then electromagnetically converted to electrical energy. Temperature fluctuations in a yarn muscle, having a maximum hot-to-cold temperature difference of about 13 degrees C, were used to spin a magnetic rotor to a peak torsional rotation speed of 3,000 rpm. The electromagnetic energy generator converted the torsional energy to electrical energy, thereby producing an oscillating output voltage of up to 0.81 V and peak power of 4 W/kg, based on SMPU mass.
- URI
- https://www.nature.com/articles/s41598-018-26983-4https://repository.hanyang.ac.kr/handle/20.500.11754/119095
- ISSN
- 2045-2322
- DOI
- 10.1038/s41598-018-26983-4
- Appears in Collections:
- COLLEGE OF ENGINEERING[S](공과대학) > ELECTRICAL AND BIOMEDICAL ENGINEERING(전기·생체공학부) > Articles
- Files in This Item:
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